| 41. | The first craft orbited earth for a day, the second for a week.
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| 42. | It orbited the Moon for about a year.
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| 43. | It is known to be orbited by one large planet and a brown dwarf.
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| 44. | It is orbited by a recently discovered planet.
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| 45. | When the intruder was detected the night fighter was scrambled and orbited the beacon.
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| 46. | Six satellites are planned to be initially orbited.
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| 47. | The satellite de-orbited by retracting the lens into the special equipment module.
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| 48. | Over time, planets accreted from the matter in the disk and orbited the Sun.
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| 49. | They concluded that 51 Pegasi was orbited by a planet half the mass of Jupiter.
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| 50. | Remember that all atoms consist of a positively charged nucleus orbited by negatively charged electrons?
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